Just to show how useless the right side wiper is, I've been driving my SD almost since I bought it without the right side. Had problems finding a blade to fit it, so just took the whole arm off, and haven't missed it at all. And I live in the rain capital of the US.

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past MB rides:
'68 220D
'68 220D(another one)
'67 230
'84 SD
Current rides:
'99 Lexus GS300 with 63k miles
'94 Camry wagon, "the whale"
'97 Ford F150
'92 Subaru Loyale(damn thing just won't die!!)
Currently trying to convince the wife we NEED another Benz